function testpartition2(A,fig)
n = size(A);
sn = round(n/2);
% L1 = A(1:sn, 1:sn);
L2 = A(1:sn, sn+1:2*sn);
% S1 = svd(L1);
S2 = svd(L2);
figure(fig);
% semilogy(S1, 'r');
semilogy(S2, 'b');
hold on


